Ever since it was created in 1999, the European Economic and Monetary Union (EMU) has experienced surprisingly large and persistent inflation differentials across member states causing substantial shifts in relative price levels. At the same time, member countries exhibited distinct non-synchronized output fluctuations, giving rise to a pattern of 'rotating slumps' (a term coined by Olivier Blanchard). This paper presents a stylized theoretical model of a monetary union which demonstrates how inflation differentials and relative output movements interact dynamically. A number of implications are derived from the model. In particular, national fiscal policies are shown to have an important role in containing internal macroeconomic disparities in a monetary union. An optimal fiscal policy rule is derived from the model to that purpose.Landmann -Rotating Slumps

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This paper takes a fresh look at the often confused -and therefore confusing -debate on the role of wage policy in tackling Germany's unemployment problem. The key issues in this debate are the relative importance of wages and aggregate demand in the determination of employment, the appropriate behavior of wages in relation to productivity growth, and the significance of the purchasing power effect of wages. We argue that the most useful tool to address and resolve these issues is the basic textbook model of aggregate supply and aggregate demand. Most importantly, the model predicts that employment is governed by the ratio of aggregate nominal demand and the nominal wage level. The empirical picture strongly supports this assertion. In contrast, the relation between the rate of wage growth and the rate of productivity growth does not play the causal role in determining employment that is widely attributed to it.

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